Ringer



o. 750,288. PATENTED JAN. '26, 1904.

- A. M. KNUDSEM;

RINGER.

. APPLICATION FILED JUNE 6,1902.

N0 MODEL.

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UNITED STATES ANTON M. KNUDSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TOKELLOGG Patented January 26, 1904.

SWITOHBOARD AND SUPPLY COMPANY, OF CHICAGO, ILLINOIS, A COR- PORA'IIONOF ILLINOIS.

RINGER.

SPECIFICATION forming part of Letters Patent No. '7 50,288, datedJanuary 26, 1904.

Application filed June 6, 1902. Serial No. 110,432. (No model.)

To all whom, it may concern Be it known that I, ANTON M. KNUDsEN, acitizen of the United States of America, and a resident of Chicago,county of Oook,and State of Illinois,have invented a certain new anduseful Improvement in Ringers, of which the following is aspecification.

My Invention relates to Improvements 1n magneto ringers or bells for useIn connection with telephone subscribers instruments. It

has for its object the provision of a ringer that is entirelyself-contained and means whereby the same may be mounted in a box orupon other support without the necessity of disassembling the same ortaking it apart, and thus disarranging or disturbing the adjustment ofits several parts in any manner.

The invention further consists in the novel details of constructionhereinafter described, and particularly pointed out in the appendedclaims, reference being had to the accompanya section through the centerof the permanent magnet of Fig. 1.

In the figures, 2 designates the ordinary box upon a subscriberstelephone wall set in which a ringer is adapted to be placed, said boxbeing also arranged to accommodate an induction-coil or other apparatusin its lower part, the said lower part being shown broken away inFig. 1. The upper edge 3 of this box forms a support for the ringer, andwhile a box is shown it is apparent that the hell can be used in thesame way with any suitable supporting member.

The ringer comprises a plate 4, (shown in dotted outline in Fig. 2,)upon the under side of which the spacing-studs, 5, preferably of brass,are placed. A soft-iron plate 7 is car ried upon the lower ends of thestuds 5, to the lower side of which plate the cores 8 of themagnet-coils 9 are fixed by the screws 6, which pass entirely throughthe plate 4, the spacingstuds 5, the ends of the plate 7, and thenthread into the ends of the cores 8. By this means these parts are allsecured together and to the under or inner side of the plate 4. Apermanent magnetlO is secured at its upper end to the central portion ofthe plate 7 by means of a suitable countersunk screw 11, the lower endof which extends beneath the armature 12, as shown in Fig. 1, topolarize the same. The armature 12 is pivoted centrally upon suitablepivots 13, carried in suitable lugs 14, extending downwardly from thesides of the armaturesupport 15, said armature-support being secured tothe lower ends of the cores 8 by means of jam-nuts 16, placed uponscrews or screwbolts 17, threading into the lower ends of the cores 8and forming adjustable pole-pieces therefor. The bell-tongue 18 iscarried by the vibrating armature 12 and is provided with a ball orclapper 19 at its upper end,the said tongue passing through a suitableaperture 20 in the top plate 4. These parts are all carried upon thelower side of the plate 4 and are adapted to be inserted through anenlarged aperture .21, formed in the support 3, said aperture being ofsuch dimensions, as shown in Fig. 2, as to permit these parts to befreely passed therethrouglnand at the same time the parts are socompactly arranged as not to require a large enough aperture in theplate 3 as to unduly weaken the same. The plate 4 is secured to thesupporting-plate 3 by means of bolts 22, one at either end, said boltspassing through the plate 3 and having suitable nuts threading upontheir lower ends. The ringer is thus securely held in place upon theplate 3 by the plate 4, which latter serves to strengthen the plate 3and to entirely cover and conceal the aperture 21. Suitable terminalclips 23 are monnted upon the lower side of the plate 3,

to which the circuit-conductors may be connected at one end, while theiropposite ends are connected with the conductors of the ringer-coils. V

The gongs 24: are each secured by nuts 25 to the upper end of the arm 26of a bell-crank or elbow lever support, the other arm, 27, of which issecured to the top plate by means of a pivot-screw 28 and washer 30 atthe angle of the two arms, as shown in Fig. 4, and the clamping-screw29, passing through a slot in the other end of the arm 27 to clamp theadjusted support in position. The arm 26 is inclined to the plane of thearm 27 and is raised above the plate 4:, as shown in Figs. 1 and 3. Byvarying the position of the inner ends of the arms 27 of thegong-supports the distance between the gongs may be adjusted as desired.The plates 31 and 82, Fig. 2, indicate the usual front and back of box2.

I do not claim herein the feature of the adjustable pole-pieces 17 ofthe magnet-cores, since in its individual capacity it forms no part ofmy invention.

From the foregoing it is evident that I have produced a ringer which isat once simple, complete, durable, and efficient and which is entirelyself-contained, so that it may be installed without the necessity ofdisassembling the same to any extent, as is required in the ordinaryringer.

Another important advantage is that the gongs are always at the samedistance from the front face of the box and the same pleasing appearanceof the mounted device may always be secured, whereas with the bells inwhich the supporting-plate is secured to the inner face of the box thegongs may be close to or far from the outer face, according to thethickness of the wall of the box, which often varies, and it issometimes even necessary to use difierent lengths of ports for thegongs. In this bell the adjustment is made at the time of assembling andis not required to be adjusted after mounting, as is the case with allother styles of similar bells.

What I therefore claim is- 1. In a polarized signaling-bell, thecombination with a supporting-plate adapted to be secured to the outsideof a suitable box, of gongs upon the outer side of said plate andadjustably carried therefrom, magnet-coils and associated partsincluding a permanent magnet carried upon the inner side of said plateand adapted to project through the wall of and into said box, wherebythe mountings of the said gongs and their distances from the outside ofthe said box is independent of the thickness of the walls thereof,substantially as described.

2. The combination with an inclosing box, of a self-contained bellincluding assembled and adjusted gongs and electro and permanentmagnets, one wall of said box having an aperture, and means, carryingsaid gongs upon one side and said magnets upon the other, for bodilymounting said bell upon said wall of the box without disassembling thesame or disturbing its adjustment by passing the said magnets throughsaid aperture from the outside and securing the bell in place thereonwith the said magnets inside the box and the said gongs outside,substantially as described.

3. The combination with an inclosing box having an aperture formed inone ofits walls, of a self-contained signaling-bell having a supportingescutcheon-plate fitting over said aperture on the outside of the saidwall, said plate being secured to the said wall and concealing the saidaperture therein, magnet-coils for the bell carried upon the inner sideof said plate and projecting through said aperture into the said box,and gongs for the bell upon the outer side of said plate, whereby thesaid self-contained bell may be mounted upon the box with its magnetswithin the same and its gongs outside without disassembling the same anda finished and neat appearance is presented when the bell is so mounted,substantially as described.

i. The combination with an inclosing box having an aperture in one ofits walls, of a self-contained signaling-bell comprising a supporting-plate, magnet-coils and associated parts mounted upon the inner side ofsaid plate within the limits of said supportingplate and adapted toreadily pass through said aperture, whereby the bell may be mounted uponthe box by passing the said coils and associated parts through saidaperture into the box and securing the said plate to the outer face ofthe said wall, said plate forming an escutcheon for the said apertureand concealing the same when secured in place, and gongs for the bellupon the outer side of said plate and carried thereby, substantially asdescribed.

5. The combination with a self-contained polarized signaling-bellcomprising a supporting escutcheon-plate, a pair of magnet-coils and theassociated permanent magnet and armature secured to the inner side ofsaid plate and all within the outer limits thereof, a pair of gongsadjustably mounted upon the outer side of said plate, and a bell-tongueextending from said armature through said plate and carrying a hammer orball in operative relation with said gongs, of an inclosing box havingan aperture formed in one of its walls of sufficient size to permit saidmagnet-coils and associated parts to readily pass therethrough but smallenough to be covered and concealed by said plate, whereby said bell maybe readily mounted on said box by passing the said coils and associatedparts through said aperture and securing said plate to the outer face ofsaid box-wall without the necessity of disassembling the bell ordisturbing Signed by me at Chicago, county of Cook, the adjustment ofgorgsilwlo lereby the said State of Illinois, this 16th day of May,1902.

aperture is concea e an t e istance of t e T gongs from the outer faceof the box is inde- KNUDSEN' 5 pendent of the thickness of the wallsthereof Witnesses: so that a neat appearance is always presented,WILLIAM W. DEAN,

substantially as described. ROBERT LEWIS AMES.

